Cladogenesis


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cladogenesis

[‚klad·ə′jen·ə·səs]
(evolution)
Evolution associated with altered habit and habitat, usually in isolated species populations.

Cladogenesis

 

(from Greek klados, “branch,” and “genesis”), a form of evolution of a group of living organisms leading by means of divergence to an increase in the number of separate species, genera, and families. The term, introduced by the German biologist B. Rensch in 1947, is often used as a synonym for speciation in the narrow sense—not completely accurately, since cladogenesis includes any increase in evolutionary diversity. The concept of cladogenesis is closely related to adaptive radiation and idioadaptation.

REFERENCES

Takhtadzhian, A. L. Sistema i filogeniia tsvetkovykh rastenii. Moscow-Leningrad, 1966. Pages 15–25.
Rensch, B. Neuere Probleme der Abstammungslehre: Die transspezifische Evolution, 2nd ed. Stuttgart, 1954.
References in periodicals archive ?
Multiple lines of evidence support the hypothesis that cladogenesis and anagenesis occurred within the human lineage after the initial split between the human and chimp lineages.
Endemic species may arise by any of several evolutionary mechanisms, including local cladogenesis and extinction throughout the rest of a geographic range.
Nevertheless in the above-mentioned, the study of the morphometry as such, does not lead, in great measure, to the establishment of a strong form homology, since according to VILORIA (2001), the labial palpi could have been originated in a multiple and independent way in the Rhopalocera cladogenesis.
irresolution due to a lack of data, rather than 'hard' polytomies which is an assertion of simultaneous cladogenesis (Coddington & Scharff 1996).
Casting species as individuals does not privilege cladogenesis.
Later developments in the statistical analysis of nonrandom cladogenesis have included relative rate tests of diversification (Sanderson and Donoghue 1994), skewness tests of tree topologies (Slowinski and Guyer 1989), and effects of varying rates of cladogenesis on phylogeny reconstruction (Nee et al.
Biogeography of Triassic tetrapods: evidence for provincialism and driven sympatric cladogenesis in the early evolution of modern tetrapod lineages.
Hypotheses: We anticipate multiple origins of lichenicolous fungi, partial parallel cladogenesis, and Gondwanan origin for the Cladoniaceae, but current patterns of distribution are probably partly explained by recent dispersal.
Within the Zingiberales, such a study has been conducted for the family Costaceae (Specht, 2005) where dense species-level sampling across the family includes molecular data for each taxon so that branch lengths could be estimated and a molecular clock approach used to develop age estimates for each of the major bifurcations indicating diversification events in the form of cladogenesis or speciation.
2005); este registro cambia la suposicion previa de que el genero Arctotherium era endemico de America del Sur; pero lo cierto es que este genero experimento una cladogenesis importante en el Pleistoceno tardio de America del Sur (Soibelzon et al.
Labile ecotypes accompany rapid cladogenesis in an adaptative radiation of Mandarina (Bradybaenidae) land snails.
Molecular evidence suggests that cladogenesis within Natalina s.